It took him and his girlfriend a few days of work, but they harvested all the olives by hand (using rakes and nets), took them to a local olive mill and for around €50 (flat fee for any amount of olives up to a certain batch size) got back a 50-litre barrel filled with some of the most delicious extra virgin olive oil I've ever tasted. At least a year's supply for them.
Fast fibre internet there too despite being in the countryside. I don't think he's coming back!